gcp cloud function returns 404 when deployed from command line

If I deploy the example hello world within the console, the url/trigger works. If I deploy from command line it looks to be exact same code / attributes in cloud functions console, but the url is 404. I can't spot the difference/issue.

The deployed trigger/url shows - "404 page not found" for the below hello world example if deployed this way from command line.

gcloud functions deploy hellogo --entry-point=HelloWorld --trigger-http --region=us-central1 --memory=128MB --runtime=go116 --allow-unauthenticated

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-html -->

// Package p contains an HTTP Cloud Function.
package p

import (
	"encoding/json"
	"fmt"
	"html"
	"io"
	"log"
	"net/http"
)

// HelloWorld prints the JSON encoded "message" field in the body
// of the request or "Hello, World!" if there isn't one.
func HelloWorld(w http.ResponseWriter, r *http.Request) {
	var d struct {
		Message string `json:"message"`
	}

	if err := json.NewDecoder(r.Body).Decode(&d); err != nil {
		switch err {
		case io.EOF:
			fmt.Fprint(w, "Hello World!")
			return
		default:
			log.Printf("json.NewDecoder: %v", err)
			http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
			return
		}
	}

	if d.Message == "" {
		fmt.Fprint(w, "Hello World!")
		return
	}
	fmt.Fprint(w, html.EscapeString(d.Message))
}

<!-- end snippet -->

Tried to reproduce your error but couldn't replicate on my end. I've use the same command as yours and I can successfully access the url or call via HTTP trigger the deployed hello world cloud function.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

gcloud functions deploy hellogo --entry-point=HelloWorld --trigger-http --region=us-central1 --memory=128MB --runtime=go116 --allow-unauthenticated

<!-- end snippet -->

Output of successful curl:

I suggest you check the url you're trying to access since according to this GCP doc:

> If you attempt to invoke a function that does not exist, Cloud Functions responds with an HTTP/2 302 redirect which takes you to the Google account login page. This is incorrect. It should respond with an HTTP/2 404 error response code. The problem is being addressed.

The solution

> Make sure you specify the name of your function correctly. You can
> always check using gcloud functions call which returns the correct 404
> error for a missing function.

You can also refer to this complete guide to quickstart your CF creation and deployment using the Go runtime.

Thanks all, my project where I got stuck has more code in it than just this function. I went down this path after trying to deploy a single function/file within larger project. If I simplify down to a folder with just a hello.go and go.mod indeed it works :-/ to deploy it from command line:

gcloud functions deploy hellogo --entry-point=HelloWorld --trigger-http --region=us-central1 --memory=128MB --runtime=go116 --allow-unauthenticated

// go.mod

module github.com/nickfoden/hello

go 1.16

Thank you for the fast replies and assistance. Rather than try to create a single function within existing project with larger go.sum, multiple folders, existing server/api etc. I am going to start from here having a single file with a cloud function and build on top of it and see at what point/if I get stuck again.